bulge out vs protrude

bulge out and protrude both are verbs.

Word	Noun	Adjective	Verb	Adverb
bulge out	No	No	Yes	No
protrude	No	No	Yes	No

As verbs, bulge out and protrude are synonyms defined as:

Other synonyms of bulge out include bug out, bulge, come out, pop, pop out, start.

bulge out (verb)	protrude (verb)
bulge outward	swell or protrude outwards
	bulge outward
	extend out or project in space